Gettysburg: The Most Important Event of 1863?

Even for those of us unfamiliar with history, the very name “Gettysburg” suggests a monumental clash of armies. But beyond the chaos of the battle itself, what was the impact of Gettysburg on the greater Civil War?

Four historians from the U.S. Army Command and General Staff College at Fort Leavenworth address the question in Gettysburg: The Most Important Event of 1863?